Results 21 to 30 of about 3,288,984 (371)
SfSNet: Learning Shape, Reflectance and Illuminance of Faces 'in the Wild' [PDF]
2018 IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2017 We present SfSNet, an end-to-end learning framework for producing an accurate decomposition of an unconstrained human face image into shape, reflectance and illuminance. SfSNet is designed to reflect a physical lambertian rendering model.
Soumyadip Sengupta +3 more
semanticscholar +1 more source
A Novel 3D Topography Stitching Algorithm Based on Reflectance and Multimap
Applied Sciences, 2023 Surface topography is an efficient tool for the understanding of physical phenomena, especially if multiscale roughness analysis is performed. However, the observable scale range in a topography measured with 3D optical profilometers is quite limited ...
Julie Lemesle +2 more
doaj +1 more source
Active multilayer mirrors for reflectance tuning at extreme ultraviolet (EUV) wavelengths [PDF]
, 2012 We propose an active multilayer mirror structure for EUV wavelengths which can be adjusted to compensate for reflectance changes. The multilayer structure tunes the reflectance via an integrated piezoelectric layer that can change its dimension due to an
Bayraktar, M. +6 more
core +2 more sources
Colored and paintable bilayer coatings with high solar-infrared reflectance for efficient cooling
Science Advances, 2020 A simple, inexpensive, and paintable bilayer coating approach enables both color and efficient cooling. Solar reflective and thermally emissive surfaces offer a sustainable way to cool objects under sunlight.
Yijun Chen +10 more
semanticscholar +1 more source
In Situ Photoacoustic Study of Optical Properties of P-Type (111) Porous Silicon Thin Films
Nanomaterials, 2021 Porous silicon (PSi) on p++-type (111) silicon substrate has been fabricated by electronically etching method in hydrofluoric acid (HF) media from 5 to 110 mA/cm2 of anodizing current density.
Cristian Felipe Ramirez-Gutierrez +4 more
doaj +1 more source
Crystals, 2023 The presented work shows the study of energy transitions in the NIR and visible regions in the system of Bi2O3 and Tm2O3 powders. Mechanisms of upconversion luminescence and NIR luminescence between two Bi3+ and Tm3+ ions at T = 80 K accompanied with ...
Dmitry A. Artamonov +6 more
doaj +1 more source
Evaluation of Stem Rust Disease in Wheat Fields by Drone Hyperspectral Imaging
Sensors, 2023 Detecting plant disease severity could help growers and researchers study how the disease impacts cereal crops to make timely decisions. Advanced technology is needed to protect cereals that feed the increasing population using fewer chemicals; this may ...
Jaafar Abdulridha +5 more
doaj +1 more source
Photonics, 2022 We demonstrate an efficient sensing of both gaseous and aqueous analytes utilizing Bloch surface waves (BSWs) and guided waves (GWs) excited on a truncated one-dimensional photonic crystal (1DPhC) composed of six TiO2/SiO2 bilayers with a termination ...
Tomas Fort +4 more
doaj +1 more source
Reflectance Fluctuations in an Absorbing Random Waveguide [PDF]
, 1996 We study the statistics of the reflectance (the ratio of reflected and incident intensities) of an $N$-mode disordered waveguide with weak absorption $\gamma$ per mean free path. Two distinct regimes are identified.
A. D. Stone +15 more
core +4 more sources
Canopy near-infrared reflectance and terrestrial photosynthesis
Science Advances, 2017 Quantifying the near-infrared light reflected by plant canopies improves our ability to estimate global photosynthesis. Global estimates of terrestrial gross primary production (GPP) remain highly uncertain, despite decades of satellite measurements and ...
Grayson Badgley, C. Field, J. Berry
semanticscholar +1 more source